91418098 has 4 divisors (see below), whose sum is σ = 137127150. Its totient is φ = 45709048.

The previous prime is 91418087. The next prime is 91418099. The reversal of 91418098 is 89081419.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89081419 = 7 ⋅12725917.

It can be written as a sum of positive squares in only one way, i.e., 47155689 + 44262409 = 6867^2 + 6653^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 91418098.

It is not an unprimeable number, because it can be changed into a prime (91418099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22854523 + ... + 22854526.

Almost surely, 2^91418098 is an apocalyptic number.

91418098 is a deficient number, since it is larger than the sum of its proper divisors (45709052).

91418098 is a wasteful number, since it uses less digits than its factorization.

91418098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45709051.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 91418098 is about 9561.2811903008. The cubic root of 91418098 is about 450.4819494920.

The spelling of 91418098 in words is "ninety-one million, four hundred eighteen thousand, ninety-eight".